Dispensing shower head



Sept. 19, 1967 w. w. WEESE DISPENSING SHOWER HEAD 2 Sheets-Sheet 1 FiledJan. 4, I 1965 INVENTOR WILFRED W WEESE ATTORNEYS Sept. 19, 1967 w. w.WEESE DISPENSING SHOWER HEAD 2 Sheets-Sheet 2 Filed Jan. 4, 1965 FIGG 'FIGIO INVENTOR WILFRED W WEESE BY mzmw ATTORNEYS United States Patent3,342,419 DISPENSING SHOWER HEAD Wilfred W. Weese, New York, N.Y.,assignorto Harry Swartz, New York, N.Y. Filed Jan. 4, 1965, Ser.No.-422,946 14 Claims. (Cl. 239-313) This invention relates to a showerhead, and more particularly, to apparatus for dispensing a treatment.solution from a shower head.

Various attempts have been made to provide means for introducingtreatment materials, such as shampoo, cosmetic and medicinalpreparations into the spray from a shower head. Devices previouslyproposed have been awkward to use and do not provide for adequate mixingof the treatment material with the Water spray.

Accordingly, it is an object of this invention to provide an improvedshower head.

It is another object of this invention to provide safe and etficientmeans for introducing treatment fluid into the shower spray.

It is a further object of this invention to provide an improved showerhead dispensing device.

It is a still further object of this invention to provide means forconveniently transferring a treatment fluid from a container to a showerhead.

These objects are accomplished in accordance with a preferred embodimentof the invention by a shower head having a chamber for receivingtreatment fluid. A piston is mounted for reciprocation in the chamber,and a supply conduit communicates between the exterior of the showerhead and the interior of the chamber. A fitting on the outside of theshower head is adapted to receive from a container pressurized fluidunder suflicient pressure to displace the piston. An outlet conduitcommunicates between the interior of the chamber and the interior of theshower head and a spring urges the piston toward the outlet conduit,thereby dispensing the treatment fluid into the water stream which flowsthrough the shower head. The rate of flow of treatment fluid through theoutlet conduit may be adjusted by a valve, and the spray from the showerhead may be changed to provide a converging or diverging spray pattern.The fitting on the exterior of the shower head is adapted to receive ahollow coupling on the valve stem of a conventional pressurizedcontainer. When the valve stem is displaced, fluid flows from thecontainer into the chamber. A cap on the valve stem rigidly engages thecontainer to prevent accidental displacement of the valve stem, but thecap is readily released to allow operation of the valve stem.

This preferred embodiment of the invention is illustrated in theaccompanying drawings in which:

FIG. 1 is a side elevational view of the shower head and a containerhaving the coupling and cap of this invention;

FIG. 2 is a cross sectional view of the shower head, adjusted for aconverging spray pattern;

FIG. 3 is a cross sectional view of the shower head showing the pistonpartially displaced from its position in FIG. 2 and adjusted for adiverging spray pattern;

FIG. 4 is a detail sectional view of the treatment fluid chamber withthe piston at the end of its travel;

FIG. 5 is a detail perspective view of the metering ring for adjustingthe rate of flow of treatment fluid;

FIG. 6 is a cross sectional view of the valve of a pressurized containerand showing the locking cap and coupling of this invention;

FIG. 7 is a detail view of the valve of the pressurized container as inFIG. 6, but with the locking cap in the released position;

FIG. 8 is a cross sectional view of the valve and locking cap along theline 8-8 in FIG, 6;

r 3,342,419 Patented Sept. 19, 1967 FIG. 9 is a perspective view of thelocking cap of this invention; and

FIG. 10 is a side elevational view of the locking cap.

Referring to FIG. 1, the apparatus of this invention includes a showerhead 2 which may be mounted on the end of a flexible pipe 4. A coupling6 on a valve stem of a conventional pressurized container 8 cooperateswith a fitting 10' on the shower head for transferring treatment fluidfrom the container 8 into the shower head 2. A locking cap 12 engagesthe valve stem and prevents accidental discharge of the contents fromthe container 8.

The shower head '2 is secured to the flexible pipe 4 by a coupling 14,as shown in FIG. 2. The shower 'head 2 includes a hollow body '16 inwhich a cylinder 18 is mounted. The cylinder 18 has a tubular extension20 which is threadedly secured in the coupling 14. The tubular extension20 has a radial flange 22, and the end portion of the body 16 is clampedbetween the flange 22 and thecoupling 14.

At the opposite end of the body 16, external screw threads 24 areprovide and a ring 26 is threadedly secured on the body 16. A pluralityof pins 28 are secured in the ring 26 and extend into an annular groove30 in the body 16. By rotating the ring 26, it may be displaced axiallyrelative 'to the body 16 until the pins 28 engage the shoulder at oneend of the groove 30', or the threads 24 at the opposite end of thegroove 30. A flexible spray element 32 of substantial thickness has aband 34 secured along its periphery. The band 34 is also secured to thering 26. A sleeve 36 is bonded in a central opening in the spray element32. The spray element 32 may be formed of rubber or other flexiblematerial.

A cylinder cover 38 is mounted in the end of the cylinder 18 and held inplace by a snap ring 40. The cover 38 includes a cylindrical boss 42 anda tubular portion 44- extending outwardly from the boss 42. The sleeve36 is mounted on the tubular portion 44 with one end abutting againstthe boss 42 and the opposite end abutting against an annular ring 46.The ring 46 is secured on the tubular portion 44 by a snap ring 48.There is a sufliciently close fit between the sleeve 36 and the tubularportion 44 to prevent leakage therebetween, but the sleeve 36 is free toturn relative to the tubular 'portion'4'4. If desired, an O-ring orother sealing means maybe inserted between the sleeve 36 and the tubularportion 44.

The spray element 32 is of substantial thickness and has a plurality ofnozzle openings 50. The length of the nozzle openings may be extended byproviding projections 52 on the outer surface of the spray element 32.Since the nozzle openings 50 are relatively long, .the stream issuingfrom the nozzle remains in a relatively narrow stream for a substantialdistance away from the spray element 32. The direction of the streamissuing from each nozzle 50 may be adjusted by turning the ring 26relative to the body 16. When the ring 26 is adjusted to the positionshown in FIG. 2, the streams issuing from the nozzles 50' form aconvering pattern, and when the ring .26 is adjusted to the positionshown in FIG. 3., 'a divergent spray pattern is obtained. While the ring26 is being rotated with respect to the body 16, the spray element 32and the band 34 rotate with the ring 26, and the sleeve 36 rotatesrelative to the tubular portion 44.

Water flows into the interior of the body 16 from the tubular extension20 through ports 54. A check valve 56 prevents the reverse flow of waterfrom the body 16, back through the ports 54. The check valve 56 is inthe form of a flexible, resilient band, preferably formed of rubber.Water pressure in the tubular extension 20 urges the valve 56 away fromthe ports-54 and the water flows into the at one end than at the other,so that the thin end of the band deflects to a greater extent under thepressure of the water flowing through the ports 54, thereby deflectingthe stream downwardly into the body 16.

The cylinder 18 has a rod 58 mounted for reciprocating movement in oneend of the cylinder 18 and the opposite end of the rod 58 is mounted inthe tubular portion 44 of the cover 38. A collar 60 is secured on therod 58 by a pin 62 adjacent one end of the cylinder 18 and a collar 64is secured on the opposite end of the rod 58 by a pin 66. A valveelement 68 is secured on the intermediate portion of the rod 58 by a pin70. A piston 72 in the cylinder 18 is guided by the rod 58, but it is afloating piston and moves longitudinally relative to the rod 58, betweenthe collar 60 and the valve element 68. A counterbore 74in the cover 38forms a valve seat for the valve member 68. At the bottom of thecounterbore 74, a Washer 76 frictionally grips the rod 58 to provideresistance to longitudinal displacement of the rod. The washer is heldin place by a snap ring 78. A plurality of ports 80 are provided in theboss 42 and a valve in the form of a metering ring 82 is slidablymounted on the boss 42. A spring 84 in the cylinder urges the piston 72towards the outlet ports 80 and a plurality of vent openings 86 in thecylinder 18 allow water to flow into and out of the space behind thepiston.

As shown in FIG. 5, the metering ring 82 has a slot 83 to permit radialexpansion of the ring. The free internal diameter of the ring 82 isslightly less than the external diameter of the boss 42, and thefriction between them resists displacement of the ring relative to theboss. The metering ring 82 has a sloping portion 90 and the length ofthe ring 82 at the end of the sloping portion adjacent the slot 88 isless than the distance between the end wall 38 and the ports 80, so thatone or more of the ports 80 may be uncovered. By turning the ring 82relative to the boss 42, the rate of flow through the ports 80 may beadjusted.

Treatment fluid is supplied to the cylinder 18 from the fitting througha tube 92 having one end mounted in the cylinder 18 and the opposite endmounted in a bore 94 extending through the body 16. The cylinder 18 hasa passage 96 communicating between the tube 92 and the interior of thecylinder 18. In order to allow the fluid from the passage 96 to flowinto the cylinder 18 between the piston and the end wall 38 a notch 98is provided in the peripheral edge of the piston 72, as shown in FIG. 2.The fitting 10 is secured in the bore 94 and has a longitu dinal passage100 and a plurality of radial passages 102. The exterior of the fitting10 is substantially cylindrical adjacent the radial passages 102. Ashoulder in the bore 100 forms a seat 104 for a ball 106. The ball 106is urged toward the seat 104 by a spring 108, thereby forming a checkvalve preventing the escape of fluid from the cyl inder 18 through thefitting 10.

The fitting 10 cooperates with the coupling 6, as shown in FIG. 1, forsupplying treatment fluid from a pressurized container 8 to the interiorof the cylinder 18. AS shown in FIGS. 6 and 7, the coupling 6 is in theform of a hollow torus 110 having aligned circular openings 112 onopposite sides. The torus 110 is preferably formed of a resilientmaterial, and the openings 112 have a slight 1y smaller diameter thanthat of the fitting 10 adjacent the radial passages 102, so that theopenings 112 dilate and form a tight sealing relation with the fittingwhen the coupling 6 is applied over the fitting, as shown in FIG. 2. Theradial passages 102 are substantially aligned with the hollow interiorportion of the torus 110.

The coupling 6 is mounted on the end of a valve stem 114 of aconventional pressurized container 8. The conventional valve assemblyincludes a valve cup 116 which is rolled and welded to the wall of thecontainer to form a rim 118. A resilient valve seat 120 is mounted inthe valve cup 116 for supporting the valve stem 114. The valve stem 114has a radial flange 122 which engages the end of the valve seat 120 andhas a valve head 124 enclosing the end of the stem 114. A plurality ofports 126 are provided in the valve steam 114 adjacent the valve head124. The valve is operated by swinging the upper end of the stem 114,thereby causing the stem to pivot on its flange 122. Since the valveseat is formed of a resilient material, the swinging movement of thestem causes the valve head 124 to become separated from the valve seat120 at one side of the stem 114. Fluid under pressure flows from theinterior of the container 8 through a tube 128 and into the valve stem114. Therefore, when the valve stem 114 is displaced from its uprightposition, the valve opens and pressurized fluid flows through the stemand into the coupling 110. The resiliency of the valve seat 120 causesthe stem to return to its upright position when the deflecting force isremoved.

In order to prevent accidental discharge of the contents of thecontainer 8, a locking cap is provided. The cap 12 includes a hubportion 130 and a web portion 132, as shown in FIGS. 6 to 10. The stem114 has screw threads 134 formed thereon and the hub 130 is internallythreaded to cooperate with the threads 134. By turning the hub 130, thecap 12 is displaced longitudinally relative to the stem 114.

The valve cup 116 has an annular groove 136 formed in its interiorsurface and, as shown in FIG. 6, the web 132 extends outwardly from thehub 130 sufliciently for its peripheral edge to engage in the groove136, when the hub is at the lower end of the threaded portion 134. Theweb 132 is sufliciently resilient to pass over the rim 118 and to springoutwardly into the groove 136. A flange 138 projects outwardly from theweb portion 132 adjacent th peripheral edge of the web. The shape of theflange 138 makes the edge of the web 132 more rigid and prevents the web132 from being displaced too deeply into the cup 116.

The cap 12 has a lock for preventing rotation of the cap relative to thestem. A pair of slots 140 extend through the flange 138 and the web 132and terminate adjacent the hub 130, as shown in FIG. 8. The slots 140separate a wedge portion 142 from the remainder of the cap 12. The wedgeportion 142 is hinged on the web 132 between the ends of the slots 140.To facilitate swinging of the wedge portion 142 into the groove 136,after the cap 12 has peen displaced to the position shown in FIG. 6, theperipheral edge of the web 132 is chamfered, as shown in FIG. 7. Acolored spot 144 or other indicator may be provided on the wedge portion142.

The web 132 is inserted in the valve cup 116 by turning the cap 12relative to the stem 114, while the wedge portion 142 is swung upwardlyrelative to the web 132, as shown in FIG. 7. The diameter of the web 132at its peripheral edge is slightly larger than the internal diameter ofthe groove 136. Since the portion of the web included in the wedgeportion 142 is temporarily displaced, the peripheral edge of the web 132may contact sufliciently'as it passes over the rim=118 for the web toenter the groove 136. As the web 132 contracts and becomes lodged in thegroove 136, the outer portions of the web and flange 138 along the edgeof each slot 140 move closer together. Therefore, when the wedge portion142 is swung downwardly into the valve cap 116, as shown in FIG. 6, iturges apart the web and flange along the slots 140 and imposes atangential force on the web 132, tending to expand it radially. Theopposite edges of the wedge portion 142 may be chamfered, as shown inFIG. 10, to facilitate spreading apart the flange 138 when the wedgeportion 142 is inserted in the valve cup 116. In this manner, the wedgeportion 142 causes the web 132 to grip the valve cup 116 more tightlyand the increased frictional force resists turning of the cap 12relative to the valve cup 116. The cup 116 may be roughened to irfi'easethe frictiona1 resistance.

The container 8 is stored with the cap 12 in the position shown in FIG.6. The hub 130 and the Web 132 prevent lateral displacement of the stem114. In order to operate the valve, it is necessary to lift thewedgeportion 142 until it is raised out of the valve cup .116. Thehub130 may then be rotated relative to the stem 114, until the peripheraledge of the web 132 is displaced out of the valve cup 116. The cap 12then occupies the position shown in FIG. 7, and the valve stem 114 isfree to swing on its flange 122 for opening the valve and dischargingthe contents of the container 8 into the coupling 6. The cap may bereapplied for holding the valve stem 114 in an upright position byturning the hub 130 while swinging the wedge portion 142 out ofengagement with the valve cup 116. After the peripheral edge of the web132 .is seated in the groove 136, the wedge portion .142 is swung downinto the valve cup and into engagement with the groove 136. The wedgeportion is chamfered as shown in FIGS. 7 and 10 to allow the wedgeportion to be inserted into the rim 118 and to pass between the edges ofthe flange 138.

In operation, the cylinder 18 may be filled with pressurized treatmentfluid from the container 8 by applying the coupling 6 over the fitting10, as shown in FIG. 2. With the cap 12 in the position shown in FIG..7, the valve stem 114 may be displaced to uncover the valve ports 126.The pressure in the container 8 propels the fluid through the valve stem114, through the toms 110 and into the passages 102. The fluid pressureis sufficiently great to displace the ball 106 off of its seat 104. Thefluid flows through the tube 92 and into the cylinder 18 between thecylinder cover 38 and the piston 72. The spring 84 urges the piston 72against the valve member 68, and when the piston is in the positionshown in FIG. 4, the valve member 68 prevents fluid from flowing intothe counterbore 74. As the treatment fluid flows into the cylinder 18from the container 8, the fluid pressure is sufliciently great toovercome the force of the spring 84 and to cause the piston 72 to bedisplaced toward the opposite end of the cylinder, until it reaches theposition shown in FIG. 2. While the piston 72 is moving through thecylinder the valve member 68 remains in the position shown in FIG. 4,since the washer 76 resists longitudinal displacement of the rod 58.

While the cylinder is being filled, the collar 64 is positioned belowthe ring 46, as shown in FIG. 4, and when the piston 72 engages thecollar 60, the rod 58 is displaced upwardly to the position shown inFIG. 2. Displacement of the rod 58 lifts the valve member 68 from the.seat in the counterbore 74 and lifts the collar 64 into the ring 46.This change in position of the collar 64 indicates that the cylinder isfull. The coupling 6 is then removed from the fitting 10. The ball 106prevents the treatment fluid from flowing out of the cylinder 18 throughthe tube 92.

Water is turned on and flows through the coupling 14 and into theinterior of the body 16, through the ports 54. The valve 56 prevents thewater from flowing back into the tubular portion 20. The ring 26 isadjusted to provide selectively a converging spray, shown in FIG. 2, ora diverging water spray, shown in FIG. 3. When the valve member 68 israised from the seat by the piston 72, the treatment fluid in thecylinder .18 flows through the counterbore 74, through the ports 80, ata selected flow rate according to the position of the metering ring 82,and into the body 16 where the treatment fluid mixes with the water.

The treatment fluid continues to flow through the ports 80, as thepiston moves toward the cylinder cover 38 under the force of the spring84 (FIG. 3). The valve member 68 remains in the position shown shown inFIG. 3, since the washer 76 resists longitudinal displacement of the rod58, but when the piston 72 reaches the cover 38, it engages the valvemember 68 and moves the valve member 68 into the counterbore 74, asshown in FIG. 4. Movement of the valve member 68 causes a correspondingmovement of the collar 64 on the lower end of the rod 58, and the collar64 is displaced out of the retaining communicating with one side of saidpiston rod and being positioned ring 46. The collar 64 maybe brightlycolored, or otherwise marked,-to indicate that the treatment fluidhasbeen exhausted.

The dispensing shower head of this invention is designed to usetreatment fluids which are packaged inconventional pressurizedcontainers. The treatment fluids may include shampoos and medicinalpreparations. The apparatus is simple to operate and to adjust. Thespray element formed by the spray element 32 is resistant to corrosionand self-cleaning due to the flexing action of the wall. Any sediment orsolids on the interior surface of the wall will be washed away throughthe nozzles 50. The cap 12 for the pressurized container 8 assures thatthecontents of the container will not be discharged accidentally.

While this invention'has been illustrated and described in oneembodiment, it is recognized that variations and changes may be madetherein, without departing from the invention as set forth in theclaims.

I claim:

1. A dispensing shower head comprising a hollow body, inlet means forconducting fluid to the interior of said body, wall means dividing theinterior of said body into a first 'fluid chamber and a second fluidchamber, said inlet means communicating with said first and secondchambers, means for discharging fluid from said first chamber, pistonmeans in said second chamber, a filling conduit communicating betweenthe exterior of said body and the interior of said second chamber, saidinlet means piston and said filling conduit communicating with theopposite side of said piston, an outlet conduit communicating betweensaid first chamber and said second chamber on said piston opposite side,valve means for controlling flow through said outlet conduit, and valvemeans for controlling flow through said filling conduit, wherebymovement of said piston displaces fluid from said second chamber throughsaid outlet conduit to said first chamber from which it passes out ofsaid body through said discharge means.

2. A dispensing shower head according to claim 1 wherein said outletconduit valve means includes a cylindrical boss on said second chamber,said boss having a radial port therein, said :outlet conduitcommunicating with said port, and a metering ring on said boss, saidring having a spiral edge and being mounted coaxially on said boss,whereby rotation of said ring progressively changes the flow area ofsaid ports.

3. A dispensing shower head according to claim 1 wherein said pistonmeans includes a piston having an opening therein, a piston rodextending through said piston opening, said piston being movablelongitudinally relative to said piston rod, and abutment means on saidpiston rod, said abutment means being spaced apart on said on oppositesides of said piston, whereby said piston rod is displacedlongitudinally by said piston when in engagement with said abutmentmeans.

4. A dispensing shower head according to claim 3 wherein said outletconduit valve means includes a valve element, said valve element beingrigidly connected with said piston rod, whereby longitudinal movement ofsaid piston rod displaces said valve element into closing relation withsaid outlet conduit.

5. A dispensing :shower head according to claim 3 wherein said abutmentmeans includes a collar secured on said piston rod, said collar beingpositioned on said one .side of the piston, said piston rod including aneX- posed portion on the exterior-of said body, whereby movement of.said piston into engagement with said collar during filling of saidsecond chamber is indicated by movement of said rod exposed portion.

6. A dispensing shower head according to claim 3 wherein said abutmentmeans includes a collar secured on said piston rod, said collar beingpositioned on said one side of the piston, said abutment means alsoincludes a ring secured on said piston rod, said ring being positionedon said opposite side of the piston, said outlet valve means includes avalve elementsecured on said piston rod, and means forming a valve seatin said second chamber in position to be engaged by said valve element,said valve seat being on the opposite side of the valve element fromsaid piston, whereby movement of the piston along the rod in onedirection into engagement with said collar displaces said valve elementaway from said valve seat while movement in the opposite direction intoengagement with said ring displaces said valve element toward said valveseat.

7. A dispensing shower head according to claim 6 wherein said ring isintegral with said valve element.

8. A dispensing shower head according to claim 6 including means forbiasing said piston towardsaid valve seat.

9. A dispensing shower head comprising a hollow body, means forming afirst chamber and a second chamber in said body, means for sprayingfluid'out of the body, said spraying means communicating with said firstchamber, means for conducting fluid into said first chamber, said secondchamber being substantially cylindrical, a movable piston in said secondchamber, a filler conduit communicating between the exterior of saidbody and the second chamber on one side of said piston, an outletconduit communicating between said first Chamber and said second chamberon said one side of the piston, valve means in said outlet conduit,means biasing the piston toward said outlet conduit, and one-Way valvemeans in said filler conduit preventing flow outwardly from said secondchamber, whereby treatment fluid may be introduced into the secondchamber and dispensed into the first chamber where it mixes with thefluid therein and is expelled through the spraying means.

10. A dispensing shower head comprising a hollow body, means forming afirst chamber and a second chamber in said body, means for sprayingfluid out of the body, said spraying means communicating with said firstchamber, means for conducting fluid into said first chamher, said secondchamber being substantially cylindrical,

a movable piston in said second chamber, a filler conduit communicatingbetween the exterior of said body and the second chamber on one side ofsaid piston, one-way valve means in said filler conduit preventing flowoutwardly from said second chamber, a rod extending axially through saidsecond chamber, said rod being movable longitudinally relative to saidpiston and said chamber, an outlet conduit communicating with said firstchamber and having a valve seat concentric with said rod and facingtoward said piston, a valve member secured on said rod between saidpiston and said valve seat, abutment means secured on the rod on theopposite side of the piston from said valve member, said valve memberand said abutment means being spaced apart a distance less than thelength of said chamber, and means biasing the piston toward said valveseat, whereby the piston engages the abutment means to lift the valvemember from the valve seat when the chamber is filled, and moves thevalve member into engagement with the valve seat when the chamber isempty.

11. A dispensing shower head according to claim 10 including indicatormeans, said indicator means being operatively connected with said rod,whereby the filled and empty conditions of the second chamber areindicated.

12. A dispensing shower head comprising a hollow body, means forming afirst chamber and a second chamher in said body, means for sprayingfluid out of the body, said spraying means communicating with said firstcham her, means for conducting fluid into said first chamber, saidsecond chamber being substantially cylindrical and having opposite endwalls, a movable piston in said second chamber, a filler conduitcommunicating between the exterior of said body and the second chamberon one side of said piston, one-way valve means in said filler conduitpreventing flow outwardly from said chamber, a rod extending throughsaid end walls and through said chamber, said rod being movablelongitudinally relative to said piston and said chamber, one end wall onsaid one side of said piston having a bore therein coaxial with said rodand forming a valve seat, a valve member secured, on said rod betweensaid piston and said valve seat, abutment means secured on the rod onthe opposite side of the piston fromsaid valve member, said valvememberand said abutment means being spaced apart a distance less thanthe length of said chamber, means biasing the piston toward said valveseat, said end wall having a cylindrical boss on the side opposite saidvalve seat, a ring mounted for rotation on said boss, said ring having anonuniform axial length, and ports in said one end wall communicatingbetween said bore and said boss, whereby the ring may be turned relativeto the boss to adjust the rate of fluid flow through said ports.

13. A dispensing shower head comprising a hollow body, means forming afirst chamber and a second chamber in said body, means for sprayingfluid out of the body, said spraying means communicating with said firstchamber, means for conducting fluid into said first chamber, said secondchamber being substantially cylindrical, a movable piston in said secondchamber, a filler conduit communicating between the exterior of saidbody and the second chamber on one side of said piston, means forming acylindrical boss in said first chamber, a ring mounted for rotation onsaid boss, said ring having a nonuniform axial length, outlet conduitmeans communicating between said second chamber and the exterior of saidboss and terminating in ports adjacent said ring, means biasing thepiston toward said outlet conduit, and one-way valve means in saidfiller conduit preventing flow outwardly from said second chamber,whereby the ring may be turned relative to the boss to adjust the rateof flow through the ports.

14. A dispensing shower head comprising a hollow body, means forming afirst chamber and a second chamber in said body, means for sprayingfluid out of the body, said spraying means communicating with said firstchamber, means for conducting fluid into said first chamber, a tubularconduit extending through said body and into said second chamber,one-way valve means in said tubular conduit preventing flow outwardlyfrom said second chamber, a fitting secured on the exterior of saidbody, said fitting having a cylindrical projection thereon, saidprojection having a radial port therein and means communicating betweensaid radial port and said tubular conduit, whereby treatment fluid maybe injected into the radial port and through the tubular conduit to thesecond chamber.

References Cited UNITED STATES PATENTS 2,028,214. 1/1936 Hennessy 239314 2,199,478 5/1940 Bruzaud 2393 15 2,689,767 9/ 1954 Dabringhaus 239-315 3,192,950 7/1965 Weese et al.- 2393 13 FOREIGN PATENTS 1,296,950- 5/1872 France.

EVERETT W. KIRBY, Primary Examiner,

1. A DISPENSING SHOWER HEAD COMPRISING A HOLLOW BODY, INLET MEANS FORCONDUCTING FLUID TO THE INTERIOR OF SAID BODY, WALL MEANS DIVIDING THEINTERIOR OF SAID BODY INTO A FIRST FLUID CHAMBER AND A SECOND FLUIDCHAMBER, SAID INLET MEANS COMMUNICATING WITH SAID FIRST AND SECONDCHAMBERS, MEANS FOR DISCHARGING FLUID FROM SAID FIRST CHAMBERS, PISTONMEANS IN SAID SECOND CHAMBER, A FILLING CONDUIT COMMUNICATING BETWEENTHE EXTERIOR OF SAID BODY AND THE INTERIOR OF SAID SECOND CHAMBER, SAIDINLET MEANS COMMUNICATING WITH ONE SIDE OF SAID PISTON AND SAID FILLINGCONDUIT COMMUNICATING WITH THE OPPOSITE SIDE OF SAID PISTON, AN OUTLETCONDUIT COMMUNICATING BETWEEN SAID FIRST CHAMBER AND SAID SECOND CHAMBERON SAID PISTON OPPOSITE SIDE, VALVE MEANS FOR CONTROLLING FLOW THROUGHSAID OUTLET CONDUIT, AND VALVE MEANS FOR CONTROLLING FLOW THROUGH SAIDFILLING CONDUIT, WHEREBY MOVEMENT OF SAID PISTON DISPLACES FLUID FROMSAID FRIST CHAMBER THROUGH SAID OUTLET CONDUIT TO SAID FIRST CHAMBERFROM WHICH IT PASSES OUT SAID BODY THROUGH SAID DISCHARGE MEANS.